syzkaller login: [ 34.926393] BUG: Bad rss-counter state mm:00000000e46c74b8 type:MM_FILEPAGES val:33 [ 34.927100] BUG: Bad rss-counter state mm:00000000e46c74b8 type:MM_ANONPAGES val:22 [ 35.141949] ================================================================== [ 35.142586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.143211] Read of size 8 at addr ffff88800c770a50 by task sshd/221 [ 35.143758] [ 35.143904] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.144469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.145112] Call Trace: [ 35.145334] [ 35.145532] dump_stack_lvl+0x91/0xf0 [ 35.145868] print_report+0xcc/0x620 [ 35.146186] ? __virt_addr_valid+0x102/0x340 [ 35.146544] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.146943] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.147339] kasan_report+0xbe/0xf0 [ 35.159673] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.160105] vma_interval_tree_remove+0xc75/0xec0 [ 35.160513] vma_prepare+0xc54/0x11a0 [ 35.160841] __split_vma+0x5af/0x950 [ 35.161163] ? __pfx___split_vma+0x10/0x10 [ 35.161524] ? find_held_lock+0x2c/0x110 [ 35.161882] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.162259] ? lock_is_held_type+0x9f/0x120 [ 35.162625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.163039] ? mtree_range_walk+0x632/0x900 [ 35.163444] ? mas_walk+0x5c7/0x7c0 [ 35.163773] do_vmi_munmap+0x1f1/0x2b0 [ 35.164106] mmap_region+0x1f9/0x2660 [ 35.164433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.164782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.165256] ? __pfx_lock_acquire+0x10/0x10 [ 35.165618] ? __pfx_mmap_region+0x10/0x10 [ 35.165977] ? security_mmap_addr+0x7d/0xa0 [ 35.166339] ? get_unmapped_area+0x1f5/0x3f0 [ 35.166708] do_mmap+0x854/0xf00 [ 35.167008] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.167348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.175798] ksys_mmap_pgoff+0x3af/0x500 [ 35.176159] do_syscall_64+0x3f/0x90 [ 35.176488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.176930] RIP: 0033:0x7fc371a52d82 [ 35.177245] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 35.178650] RSP: 002b:00007ffec0d18258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.179250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc371a52d82 [ 35.187859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc370e8c000 [ 35.188426] RBP: 00007fc370e8c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.188990] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562dfdd31ec0 [ 35.189552] R13: 00007ffec0d18270 R14: 00007ffec0d182a0 R15: 00007ffec0d18600 [ 35.190126] [ 35.190327] [ 35.190476] Allocated by task 212: [ 35.190766] kasan_save_stack+0x22/0x50 [ 35.191115] kasan_set_track+0x25/0x30 [ 35.195502] __kasan_slab_alloc+0x59/0x70 [ 35.195858] kmem_cache_alloc+0x16b/0x370 [ 35.196207] vm_area_dup+0x20/0x160 [ 35.196526] __split_vma+0x170/0x950 [ 35.196842] split_vma+0xc6/0x110 [ 35.197143] mprotect_fixup+0x8d2/0xb30 [ 35.197484] do_mprotect_pkey+0x87e/0xd40 [ 35.197838] __x64_sys_mprotect+0x78/0xc0 [ 35.198189] do_syscall_64+0x3f/0x90 [ 35.198516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.198952] [ 35.199101] Freed by task 210: [ 35.199366] kasan_save_stack+0x22/0x50 [ 35.203742] kasan_set_track+0x25/0x30 [ 35.204082] kasan_save_free_info+0x2b/0x50 [ 35.204443] __kasan_slab_free+0x10a/0x190 [ 35.204804] kmem_cache_free+0x10d/0x4d0 [ 35.205151] rcu_core+0x8c8/0x2860 [ 35.205455] __do_softirq+0x1b7/0x7d4 [ 35.205783] [ 35.205932] Last potentially related work creation: [ 35.206321] kasan_save_stack+0x22/0x50 [ 35.206665] __kasan_record_aux_stack+0x8e/0xa0 [ 35.207051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.215542] remove_vma+0x139/0x170 [ 35.215853] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.216236] do_vmi_munmap+0x1f1/0x2b0 [ 35.216573] __vm_munmap+0x138/0x3a0 [ 35.216889] __x64_sys_munmap+0x59/0x80 [ 35.217227] do_syscall_64+0x3f/0x90 [ 35.217553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.217990] [ 35.218138] Second to last potentially related work creation: [ 35.218596] kasan_save_stack+0x22/0x50 [ 35.218948] __kasan_record_aux_stack+0x8e/0xa0 [ 35.219332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.219794] remove_vma+0x139/0x170 [ 35.220104] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.220478] do_vmi_munmap+0x1f1/0x2b0 [ 35.220807] mmap_region+0x1f9/0x2660 [ 35.221127] do_mmap+0x854/0xf00 [ 35.221427] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.221758] ksys_mmap_pgoff+0x3af/0x500 [ 35.222101] do_syscall_64+0x3f/0x90 [ 35.222424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.222858] [ 35.223005] The buggy address belongs to the object at ffff88800c7709f8 [ 35.223005] which belongs to the cache vm_area_struct of size 168 [ 35.223985] The buggy address is located 88 bytes inside of [ 35.223985] freed 168-byte region [ffff88800c7709f8, ffff88800c770aa0) [ 35.224910] [ 35.225059] The buggy address belongs to the physical page: [ 35.225505] page:00000000d9288bfc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc770 [ 35.226223] memcg:ffff88800a010c01 [ 35.226513] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.226941] page_type: 0xffffffff() [ 35.227242] raw: 0100000000000200 ffff8880087a0c80 ffffea000038bfc0 dead000000000008 [ 35.227884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a010c01 [ 35.228481] page dumped because: kasan: bad access detected [ 35.228919] [ 35.229066] Memory state around the buggy address: [ 35.229453] ffff88800c770900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.230020] ffff88800c770980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.230590] >ffff88800c770a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.231159] ^ [ 35.231648] ffff88800c770a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.232207] ffff88800c770b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.232769] ================================================================== [ 35.233814] Disabling lock debugging due to kernel taint [ 38.389022] BUG: Bad rss-counter state mm:00000000d6f44f92 type:MM_FILEPAGES val:33 [ 38.389717] BUG: Bad rss-counter state mm:00000000d6f44f92 type:MM_ANONPAGES val:22 [ 38.945714] BUG: Bad rss-counter state mm:000000001e219384 type:MM_FILEPAGES val:33 [ 38.946421] BUG: Bad rss-counter state mm:000000001e219384 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3738' (ECDSA) to the list of known hosts. 2023/06/21 08:09:08 fuzzer started 2023/06/21 08:09:08 dialing manager at localhost:36067 2023/06/21 08:09:08 checking machine... 2023/06/21 08:09:08 checking revisions... [ 39.879656] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:09:08 testing simple program... [ 39.948872] cgroup: Unknown subsys name 'net' [ 40.019717] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:09:08 Registers: info registers vcpu 0 RAX=00000000000000ca RBX=00000000000000ca RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f350000 RSP=ffff88800f52f7d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000000 R12=00000000000101f7 R13=ffff88800f3501a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f0da62532f0 CR3=000000000cba4000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=b9665c5529fd259100000000001344e8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=8979eba10bc26a0800000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ca5a RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff1100d9e135e RSI=ffffffff8180ca5a RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =ffffffff86139748 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800f71fc60 RIP=ffffffff84538446 RFL=00000286 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7a2f963328 CR3=000000000e852000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000